如何在go中解压缩tar.gz文件?

Question

我有一个名为file.tar.gz的文件，里面有一个folder。使用 go 我想解压缩它并将文件夹保存在当前目录中。

我在论坛上找到了这些代码，但它在我的情况下不起作用。

package main
import (
"archive/tar"
"compress/gzip"
"io"
"log"
"os"
)
func ExtractTarGz(gzipStream io.Reader) {
uncompressedStream, err := gzip.NewReader(gzipStream)
if err != nil {
log.Fatal("ExtractTarGz: NewReader failed")
}
tarReader := tar.NewReader(uncompressedStream)
for true {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("ExtractTarGz: Next() failed: %s", err.Error())
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.Mkdir(header.Name, 0755); err != nil {
log.Fatalf("ExtractTarGz: Mkdir() failed: %s", err.Error())
}
case tar.TypeReg:
outFile, err := os.Create(header.Name)
if err != nil {
log.Fatalf("ExtractTarGz: Create() failed: %s", err.Error())
}
defer outFile.Close()
if _, err := io.Copy(outFile, tarReader); err != nil {
log.Fatalf("ExtractTarGz: Copy() failed: %s", err.Error())
}
default:
log.Fatalf(
"ExtractTarGz: uknown type: %s in %s",
header.Typeflag,
header.Name)
}
}
}
func main() {
r, err := os.Open("./file.tar.gz")
if err != nil {
log.Fatalf(err.Error())
}
ExtractTarGz(r)
}

它给了我错误：

ExtractTarGz: Create() failed: open go/pkg/linux_amd64_race/unicod/utf16.a: too many open files exit status 1 

Answer 1

package main
import (
"archive/tar"
"compress/gzip"
"fmt"
"io"
"log"
"os"
)
func ExtractTarGz(gzipStream io.Reader) {
uncompressedStream, err := gzip.NewReader(gzipStream)
if err != nil {
log.Fatal("ExtractTarGz: NewReader failed")
}
tarReader := tar.NewReader(uncompressedStream)
for true {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("ExtractTarGz: Next() failed: %s", err.Error())
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.Mkdir(header.Name, 0755); err != nil {
log.Fatalf("ExtractTarGz: Mkdir() failed: %s", err.Error())
}
case tar.TypeReg:
outFile, err := os.Create(header.Name)
if err != nil {
log.Fatalf("ExtractTarGz: Create() failed: %s", err.Error())
}
if _, err := io.Copy(outFile, tarReader); err != nil {
log.Fatalf("ExtractTarGz: Copy() failed: %s", err.Error())
}
outFile.Close()
default:
log.Fatalf(
"ExtractTarGz: uknown type: %s in %s",
header.Typeflag,
header.Name)
}
}
}
func main() {
r, err := os.Open("./file.tar.gz")
if err != nil {
fmt.Println("error")
}
ExtractTarGz(r)
}